The effect of positive end expiratory pressure on incidence rate of atelectasis after coronary artery bypass graft

AUTHORS

M Niazi 1 , * , R Pormirza-Kalhori 1

1 Iran

How to Cite: Niazi M, Pormirza-Kalhori R. The effect of positive end expiratory pressure on incidence rate of atelectasis after coronary artery bypass graft, J Kermanshah Univ Med Sci. 2003 ; 7(1):e81202.

ARTICLE INFORMATION

Journal of Kermanshah University of Medical Sciences: 7 (1); e81202
Published Online: June 19, 2003
Article Type: Research Article
Received: March 15, 2003
Accepted: June 15, 2003

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Abstract

Background & Objectives: Positive end expiratory pressure (PEEP) can reduce atelectasis after general anesthesia by lung expansion and increase in alveolar pressure. Considering high incidence of atelectasis after open heart surgery and presence of reports on usefulness of PEEP in decreasing its incidence, this study was done to evaluate the effects of PEEP on incidence of atelectasis after CABG.

 Materials and Methods: Sixty patients (48 males) were divided into two groups of experiment and control (30 patients in each group). Two groups were similar with regard to age, sex, duration of cigarette smoking, aortic clamping time, cardiopulmonary bypass time, anesthesia time, ejection fraction, intubation time.     The experiment group received 5-10 cm/H2O PEEP after operation. The control group did not receive BEEP. The diagnosis of atelectasis was made using a combination of radiographic findings, WBC counts, temperature, Pao2, Paco2 and O2 saturation. Data were analyzed using t-test and chi 2.

Results: Incidence of atelectasis in experimental group was 26.7% (8 patients) and in control group 56.7% (17 patients). The difference was significant (P<0.02). Mean   Pao2 and Paco2 in the first and second days after surgery in experimental group were significantly higher than in the control group. There was no significant difference in mean temperature or o2 saturation. 

Discussion:  Use of PEEP after CABG can decrease the incidence of atelectasis in intensive care unit.

Keywords

positive end expiratory pressure atelectasis coronary artery bypass graft

© 2003, Journal of Kermanshah University of Medical Sciences. This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/) which permits copy and redistribute the material just in noncommercial usages, provided the original work is properly cited.

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